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【单选题】
在用重铬酸钾标定硫代硫酸钠中,哪种说法不正确:A.
硫代硫酸钠标准溶液标定终点颜色变化为蓝色变无色。
B.
KI 和重铬酸钾反应完全后稀释才能用硫代硫酸钠标准溶液滴定。
C.
KI 和重铬酸钾反应需要避光在碘量瓶中进行。
D.
淀粉指示剂需要近终点时加入。
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【多选题】关于受精卵发育与植入，叨5些是错误的
A.
精子到达输卵管与卵子相遇，称为精子获能
B.
获能的精子穿透初级卵母细胞的透明带，为受精的开始
C.
受精卵产生的“早孕因子”能刺激母体淋巴细胞活性，防止囊胚被排异
D.
妊娠期的子宫内膜称为蜕膜
E.
囊胚与子宫肌层之间的蜕膜为底蜕膜
【单选题】Section B Dialogue Comprehension Directions: In this section, you will read 5 short conversations between a man and a woman. At the end of each conversation there is a question followed by four choice...
A.
It's uncomfortable because of the wind.
B.
It isn't as hot as the man thought.
C.
The man expected it to be windy.
D.
The wind hasn't made it any cooler.
【简答题】要实现电动机的多地点控制,应把所有的启动按钮 并联 连接,所有的停机按钮 连接。
【简答题】在C语言中,标准输出设备和标准错误输出设备是指显示器,它们对应的指针名分别为 __________和__________。
【单选题】Hu Jin had promised that she would meet Li Fang after work, but she didn't _____. [ ]
A.
turn on
B.
turn down
C.
turn off
D.
turn up
【简答题】要实现电动机的多地点控制,应把所有的启动按钮( )连接,所有的停机按钮( )连接。
【单选题】Section B Dialogue Comprehension Directions: In this section, you will read 5 short conversations between a man and a woman. At the end of each conversation there is a question followed by four choice...
A.
The man doesn't want to repeat what he said.
B.
The man has learned a lesson from his car accident.
C.
The man is a timid person so he doesn't want to drive fast.
D.
The woman can't tolerate the man's attitude.
【单选题】Section B Dialogue Comprehension Directions: In this section, you will read 5 short conversations between a man and a woman. At the end of each conversation there is a question followed by four choice...
A.
The exam was easier than the previous one.
B.
Joe is sure that he will do better in the next exam.
C.
Joe probably failed in the exam.
D.
The oral part of the exam was easier than the written part.
【单选题】Section B Dialogue Comprehension Directions: In this section, you will read 5 short conversations between a man and a woman. At the end of each conversation there is a question followed by four choice...
A.
David has good eyesight.
B.
She agrees with the man.
C.
The man should praise David more.
D.
The man has said too much about David.
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