题目内容

奶牛，分娩时持续强烈努责1h，反见两前蹄露出阴门外，产道检查发现胎儿头颈左弯。首选的助产方法是

A. 矫正术
B. 牵引术
C. 截肢术
D. 剖腹产术
E. 翻转母体

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国际单位制的基本单位有长度单位米、热力学温度单位开[尔文]、（)、发光强度单位坎[德拉]、物质的量单位摩[尔]。

A. 时间单位时、质量单位千克、电流单位安[培]
B. 时间单位秒、质量单位克、电流单位安[培]
C. 时间单位秒、质量单位千克、电流单位安[培]
D. 时间单位分、质量单位千克、电流单位安[培]

Tina received an admission notice letter from Yale University and Liu Hui congratulates her on her admission._
TINA： Hi, Liu Hui. Guess what came in the1_ today
LIU HUI： Your bill, maybe
TINA： No, no. My acceptance2_ to Yale!
LIU HUI： Wow! Congratulations! You've been working so hard for it. When do classes start
TINA： Freshman orientation is the last week of 3_, but I want to go two weeks before that to get settled in .
LIU HUI： You are great! I guess you will have many things to do before you leave.
TINA： Yes, I'll be very busy. I have to get a 4_, buy a plane ticket and pack my things, but first I want to register for classes.
LIU HUI： Congratulations again. I believe you will have a_5 experience at Yale.

有关感光效应的叙述，错误的是

A. 与管电流成正比
B. 与管电压的n次方成正比
C. 与摄影距离成反比
D. 与摄影时间成正比
E. 与滤线栅的曝光倍数成反比

At the City Social Work Center, Zhang Hua is introducing the center to Liu Hui._ LIU