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【单选题】
把下列四种物质分别加入到 100 mL 蒸馏水的烧杯中,不能使蒸馏水导电性发生明显变化的是 ( ) A . 10 g NaCl 固体 B . 10 g NaOH 固体 C . 10 g BaSO 4 固体 D . 10 g Cu(NO 3 ) 2 固体A.
1
B.
2
C.
3
D.
4
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【单选题】- Do you remember the old man _____ a big dog? - Yes. I was afraid of it when I passed his house.
A.
used to having
B.
used to have
C.
was used to have
D.
was used to having
【单选题】— ____________? — Since I was five years old.
A.
How often do you skate?
B.
When did you begin to play baseball?
C.
How long have you been studying French
【单选题】— Could you play the guitar when you were 8 years old? — _____. [ ]
A.
Yes, I could.
B.
No, I can't.
C.
Yes, I can.
D.
No, I won't.
【简答题】瑞霞即将走向工作岗位,她选了一件格子呢西装,但又担心会显得成熟和老气,其实西装隐藏许多小心机。
【单选题】- did you start to swim? -When I was 7 yeas old. [ ]
A.
What
B.
How soon
C.
How long
D.
When
【单选题】—You fly the kites very well. —Thank you. I________ kites when I was 7 years old. [ ]
A.
can flew
B.
could flew
C.
can fly
D.
could fly
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