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【单选题】
直馏汽油中 ( ) 油含量高。A.
芳烃
B.
烷烃和环烷烃
C.
烯烃
D.
炔烃
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【简答题】小明利用如图甲所示电路测定小灯泡的功率.被测小灯泡的额定电压为 2.5V,电阻约为10Ω左右.实验室有如下器材:电源(电压为6V)、电流表(0~0.6A 0~3A)、电压表(0~3V 0~15V)、开关各一个、导线若干、滑动变阻器三只:R1(20Ω 0.5A)、R2(50Ω 0.5A)、R3(500Ω 1A). ( 1)实验前在检查仪器时,发现电流表指针如图乙所示,则接下来的操作是 ....
【单选题】Where is your mother ?
A.
She ， s a doctor.
B.
No ， she isn’t ．
C.
She’s behind the door.
【简答题】Mr Jones and Mr Brown work in the same office (办公室).One day Mr Jones says to Mr Brown , “I will have a small party at our house on Monday evening . Would you and your wife like to come ?” Mr Brown say...
【简答题】Dave：Emma, is this a photo of your family? Emma：Yes, it 36 . Dave：Is the old man(老人) 37 grandfather? Emma： 38 , he is. Dave：And who is the man(男人)? Emma：Oh, he is his 39 , Nick. Dave：So Nick is your f...
【简答题】Task 2 Amy is complaining to a salesman about a computer she bought. Listen to the conversation and fill in the blanks with what you hear. S: Good morning, madam. Can I help you? A: Well, it’s abo...
【单选题】一Is your sister a worker or a doctor? — ________．
A.
She is twenty．
B.
No，she isn’t
C.
She is a doctor
D.
She likes her job
【简答题】1 Same or different? Write S or D. ► He phoned/rang his sister. S 1 What’s your phone/mobile number? ____ 2 ... two six oh/zero four ... ____ 3 I left/took a message. ____ 4 I’m ...
【简答题】Aunt Ma sees an ad(广告)in a newspaper for a nice bed in a shop. It costs 600 yuan. Aunt Ma likes it, so she goes to the shop. The shopkeeper (店主) shows one to her. Aunt Ma has a look at it and says, “T...
【简答题】例:对某异步电机进行短路试验, W A-AB 的测量接线如图所示(图中未示出 W C-CB 、 I C 等的测量接线)。所用仪器仪表规格、仪表读数及相应的修正值见后。求 W A-AB 的功率。 所用仪器仪表的规格如下: 功率表: 0.5 级,满度 150 格,电压线圈 600V ,内阻 20000Ω ,电流线圈 5A , cosφ=0.2 低功率因数表,满刻度 600W ; 电压表: 0.5 级,...
【简答题】Do you feel lonely when your best friend isn’t around? Here’s our advice to you-- and to all kids who feel lonely sometimes. It’ s hard when a best friend isn’t around—maybe because he or she moved to...
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