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【简答题】
You may open your electronic mail and find information about how to buy medicine, cheap airline tickets, books and, of course, computers and computer products.There may also be offers for investment deals, bank loans and special holidays.However, to many computer users, this use of electronic spare to sell products has become a major problem as it makes computer communication more difficult. Many companies who want to send a great deal of advertising might use the services of a “spammer.” A spammer is a person or company that uses computers to send out millions of copies of the same sales information.Spammers find e-mail addresses from websites, news groups and “chat rooms” where people send messages to each other.Most spare is sent by companies who are trying to get you to buy their products.Some of these are honest companies that offer good products or services for a fair price.These companies can offer their products at a cheaper price than you might find in a store.However, much of the spam on the Internet is sent by criminals who are trying to sell products that do not exist or offer services they will not provide.They are only interested in stealing your money.When you answer their spam you find you are expected to send them money and receive a gift.One country in Africa has become famous for the number of criminals who try every known trick to separate people from their money. 小题1:What does the  underlined word “ spam ” in the paragraph probably refer to ? A.Unwanted electronic information that reaches computer users. B.Computer virus that causes computer communication difficulties. C.Advertisements sent out by companies who want to sell their products. D.Companies that send out millions of copies of the same sales information. 小题2:.Which of the following is TRUE according to the text? A.Companies who want to send a great deal of advertising are referred to as spammers. B.Spammers are people who collect e-mail addresses from websites, newsgroups and “chat rooms”. C.Either individuals or organizations can be regarded as spammers if they send out spam. D.Spammers are people who receive spam on their computers. 小题3:Which is the possible suggestion from the writer concerning spam ? A.Spain is very helpful in providing you with useful information about product sales. B.Spam helps companies to sell more of their products so it should be valued by people. C.Spam is sent out by those who want to separate you from your money. D.Look out for any spam that reaches your computer
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【单选题】关于慢性支气管炎病因的描述不正确的是()
A.
感染是慢支急性发作的主要诱因
B.
吸烟、大气污染是慢支发生、发展的重要因素
C.
急性发作期的主要病原菌为肺炎球菌和流感嗜血杆菌
D.
慢支是感染性和非感染性多种因素长期综合作用所致
E.
多种抗原引起的过敏反应、气道免疫功能低下亦为慢支的病因
【判断题】break 则是结束整个循环过程,不再判断执行循环的条件是否成立
A.
正确
B.
错误
【单选题】下列几种表述中,正确的有 1 是质点位矢改变量的大小,即位移的大小。 2 是质点位矢大小的改变量。 3 表示质点的加速度为零,它代表静止或匀速直线运动,即其速度的大小和方向都不变的运动。 4 表示质点的切向加速度为零,它代表速度的大小不变的运动,或者说是速率不变的运动,但其速度的方向可能会变,即法向加速度不为零,可能但不限于作匀速率圆周运动。
A.
①②③④
B.
①②③
C.
②④
D.
①③
【简答题】The seller had made a sales contract under the term with the buyer,therefore the scope of freight forwarder’s service on behalf of the buyer includes( ).
【单选题】下面用半透膜隔开的几组溶液,在相同温度下渗透方向从右向左进行的是
A.
50g ·L -1 蔗糖溶液‖ 50g ·L -1 葡萄糖溶液
B.
9 g·L -1 NaCl溶液‖0.278mmol ·L -1 葡萄糖溶液
C.
50 g·L -1 葡萄糖‖9 g·L -1 NaCl溶液
D.
5 g·L -1 葡萄糖‖10 g·L -1 NaCl溶液
【单选题】下面用半透膜隔开的几组溶液,在相同温度下渗透方向从右向左进行的是( )
A.
50g.L -1 蔗糖溶液||50g.L -1 葡萄糖溶液
B.
9g.L -1 NaCl溶液||0.278mmol.L -1 葡萄糖溶液
C.
50g.L -1 葡萄糖|| 9g.L -1 NaCl溶液
D.
0. 05mol.kg -1 MgC1 2 溶液|| O.05mol.kg -1 MgSO 4 溶液
E.
5g.L -1 葡萄糖|| 10g.L -1 NaCl溶液
【单选题】下面用半透膜隔开的几组溶液,在相同温度下滲透方向从左向右进的是( )
A.
50g/L 蔗糖溶液 ‖ 50g/L 葡萄糖溶液
B.
9g/LNaCI 溶液 ‖ 50g/L 葡萄糖溶液
C.
9g/LNaCI 溶液 ‖ 50 g/L 蔗糖 溶液
D.
0.05mol/LMgCl 2 溶液 ‖ 0.05mol/LMgSO 4 溶液
【简答题】Under the( )terms,the point of the transferring risks is when the goods pass the ship’s mil at the named point of shipment.
【判断题】break则是结束整个循环过程,不再判断执行循环的条件是否成立。
A.
正确
B.
错误
【单选题】下面用半透膜隔开的几组溶液,在相同温度下渗透方向从右向左进行的是
A.
0.2mol/L蔗糖‖0.5mol/L葡萄糖
B.
0.1mol/L NaCl‖0.1mol/L葡萄糖
C.
0.1mol/L蔗糖‖0.1mol/L NaCl
D.
0.5mol/L ‖0.5mol/L
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