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【单选题】
下列制备方法中,能够得到比较纯净H2的是()A.
稀盐酸与锌金属作用
B.
电解25%的NaOH溶液
C.
催化裂解天然气
D.
水蒸气通过红热的炭层
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反馈参考答案：
举一反三
【单选题】I told them that he ________ basketball for Canada.
A.
play
B.
played
C.
playing
D.
plays
【单选题】I also told them if they wanted a copy of my book ____ my office. I would be happy to send one to them. [ ]
A.
to call
B.
call
C.
calling
D.
called
【单选题】— Can I call for some friends and spend the day outside with them, Mom? — ____? I've told you to have a weekend at will. [ ]
A.
What for
B.
Why not
C.
How come
D.
So what
【单选题】--- Can I call for some friends and spend the day outside with them, Mom? --- ____ I’ve told you to have a weekend on your own.
A.
Why so?
B.
Why not?
C.
How come?
D.
So what?
【简答题】专业术语“LAN”的中文含义是 ( )。
【单选题】I had told them the reason ______ I didn’t attend the meeting.
A.
when
B.
which
C.
why
D.
for that
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