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【单选题】
下列推断正确的是 ( )A.
BF 3 为三角锥形分子
B.
NH 4 + 的电子式为 ， 离子呈平面正方形结构
C.
CH 4 分子中的 4 个 C—H 键都是氢原子的 1s 轨道与碳原子的 2p 轨道形成的 s-p σ 键
D.
CH 4 分子中的碳原子以 4 个 sp 3 杂化轨道分别与 4 个氢原子的 1s 轨道重叠，形成 4 个 C—H σ 键
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【简答题】Italien ist _________ als Frankreich. Und es hat auch ______ Einwohner als Frankreich.
【单选题】对实验室安全用电的叙述不正确的是()
A.
不得用照明线接2kW的电炉进行加热操作
B.
马弗炉必须单独走动力线
C.
精密仪器与马弗炉、烘箱、电磁炉等不得使用一条线送电
D.
人员离开实验室时,马弗炉、烘箱等可以不关
【单选题】听力原文：M: Do you want to turn on the air conditioner or open the window? W: I love fresh air if you don't mind. What can be inferred from the woman's answer?
A.
She'd like to have the windows open.
B.
She likes to have the air conditioner on.
C.
The air is heavily polluted.
D.
The windows are already open.
【单选题】听力原文：M: Why do you use the block to keep the door open? W: I'd like to have some fresh air into the room. What are they talking about?
A.
The fresh air.
B.
The opening of the door.
C.
The ventilation of the room.
D.
The blockade of the door.
【简答题】Er ist in Italien _____________ Slowenien.
【单选题】听力原文：M: Do you want to turn on the airconditioner or open the windows? W: I love fresh air if you don*t mind. Q: What can be inferred from the woman's answer? (17)
A.
She'd like to have the windows open.
B.
She likes to have the air conditioner on.
C.
The air is heavily polluted.
D.
The windows are already open.
【单选题】听力原文：W: Do you mind if I open the window to let in some fresh air? M: Sorry. Please don't, I've caught a cold. Why does the man want to keep the window shut?
A.
He is ill.
B.
He wants to open it himself.
C.
The air inside is fresh enough.
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