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【简答题】
在配制250mL 2.0mol/L NaOH溶液的实验中，必须使用的仪器是
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【单选题】听力原文：W: Hello, Professor Dannis, my name is Anna Adams. I read in the university newspaper that you were looking for a student to work as a language laboratory assistant? M: Yes, we arc. Are you inter...
A.
A recording artist.
B.
A French teacher.
C.
A student.
D.
A teaching assistant.
【简答题】Read and judge. (读短文，判断下列语句是否正确.正确的画“√”，错误的画“×”) Hello! My name is Anna. I am a girl and I'm from China. I have a happy family. My father and my mother are teachers. My grandma is a nice woman. She ke...
【简答题】案例1：患者男性，36岁。因间断发热2个月，皮下及牙龈出血半个月入院。血常规：Hb80g／L，WBC9.8×10 ／L，N48%，淋巴细胞52%。骨髓象示M6红白血病期。血型：正定：抗A(-)，抗B(++++)；反定：A标准红细胞(+)，B标准红细胞(-)。化疗期间，输注红细胞4个单位，同时配合药物治疗，病情有所改善。 化疗间歇期间，因高热咽痛6天再次入院。血常规：Hb66g／L，WBC4.8×1...
【简答题】从正态分布N(100; 100)中随机产生1000个随机数, ˆ 作出这1000个正态随机数的直方图; ˆ 从这1000个随机数中随机有放回地抽取500个, 作出其直方图; ˆ 比较它们的样本均值与样本方差.
【简答题】某公有派生类的成员函数不能直接访问基类中继承来的某个成员，则该成员一定是基类中的()。 (A)私有成员 (B)公有成员 (C)保护成员 (D)保护成员或私有成员
【简答题】根据过去大量资料,某厂生产的灯泡的使用寿命服从正态分布 N~ (1020,100 2 )。现从最近生产的一批产品中随机抽取16只,测得样本平均寿命为1080小时。试在0.05的显著性水平下判断这批产品的使用寿命是否有显著提高?( a =0.05)
【单选题】听力原文： W: Hello, Professor Dannis, my name is Anna Adams. I read in the university newspaper that you were looking for a student to work as a language laboratory assistant. M: Yes, we are. Are you inte...
A.
A recording artist.
B.
A French teacher.
C.
A student.
D.
An engineer.
【简答题】听力原文：A=Anna R=Roger A: Simpson & Co. Good morning. R: Hello, Anna? A: Oh, hello Roger. R: I'm glad I caught you. Listen I'm at the airport, and I've just realized I've left my diary in the office. You...
【单选题】听力原文：W: Hello, Professor Dannis, my name is Anna Adams. I read in the university newspaper that you were looking for a student to work as a language laboratory assistant? M: Yes, we are. Are you inter...
A.
A recording artist.
B.
A French teacher.
C.
A student.
D.
A teaching assistant.
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