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【简答题】
Ⅰ．（6分）如图所示，U形管的左端被胶塞封闭有甲烷和氯气（体积比为1∶4）的混合气体，假定氯气在水中的溶解度可以忽略。将封闭有甲烷和氯气的混合气体的装置 放置在有光亮的地方，让混合气体缓慢地反应一段时间。 (1)甲烷与氯气的反应属于 反应，反应后得到的所有有机产物的结构 。 (2)经过几个小时的反应后，U形的水柱变化是_______ 。 A．升高 B．降低 C．不变 D．无法确定 Ⅱ．（6分）CO、CH 4 均为常见的可燃性气体。 (1)已知在101 kPa时， CH 4 完全燃烧生成1mol液态水，放出的热量为QkJ，则CH 4 完全燃烧反应的热化学方程式是： 。 (2)120℃、101 kPa下， a mL由CO、CH 4 组成的混合气体在 b mL O 2 中完全燃烧后，恢复到原温度和压强。 ①若混合气体与氧气恰好完全反应，产生 b mL二氧化碳，混合气体中一氧化碳和甲烷的物质的量之比为： 。 ②若燃烧后气体体积缩小了a/4 mL，则a与b关系的数学表示式是 。
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【简答题】若AX=3500H,CX=56B8H,当AND AX,CX指令执行后,AX=() A1400H B77F8H C0000H D0FFFFH
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【单选题】Without a (an) ______ passport a tourist is forbidden to enter a country.
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operative
B.
effective
C.
valid
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efficient
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【单选题】若AX=3500H,CX=56B8H,当AND AX,CX指令执行后,AX=( )。
A.
1400H
B.
77F8H
C.
0000H
D.
0FFFFH
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【单选题】It is said that the agreement ______ between the two companies last month will become effective from May 1st.
A.
to sign
B.
signed
C.
to be signed
D.
signing
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【单选题】若AX=3500H,CX=56B8H,当AND AX,CX指令执行后,AX=( )。
A.
1400H
B.
77F8H
C.
3500H
D.
56B8H
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【单选题】The lecture is so attractive that the audience are listening_________.
A.
attentively
B.
anxiously
C.
effectively
D.
absolutely
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【单选题】The main topic of the passage is ______.
A.
laughter and physical exercise have similar effects on the human body
B.
smile can produce the same effects as laughter
C.
pain can be reduced by laughter
D.
laughter is the best medicine
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【单选题】However，at times this balance in nature is _______ resulting in a number of possibly unforeseen effects.
A.
troubled
B.
disturbed
C.
confused
D.
puzzled
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【单选题】Advertising is often the most _______ method of promotion.
A.
efficient
B.
efficiency
C.
effect
D.
effective
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【简答题】若AX=3500H,CX=56B8H,当AND AX,CX指令执行后,AX=() A1400H B77F8H C0000H D0FFFFH
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【判断题】在精密夹具装配的过程中,将便于拆装的零件作为补偿环,有利于简化装配工艺。
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正确
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查看完整题目与答案
【单选题】Without a (an) ______ passport a tourist is forbidden to enter a country.
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B.
effective
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valid
D.
efficient
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【单选题】若AX=3500H,CX=56B8H,当AND AX,CX指令执行后,AX=( )。
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1400H
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【单选题】It is said that the agreement ______ between the two companies last month will become effective from May 1st.
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signing
查看完整题目与答案
【单选题】若AX=3500H,CX=56B8H,当AND AX,CX指令执行后,AX=( )。
A.
1400H
B.
77F8H
C.
3500H
D.
56B8H
查看完整题目与答案
【单选题】The lecture is so attractive that the audience are listening_________.
A.
attentively
B.
anxiously
C.
effectively
D.
absolutely
查看完整题目与答案
【单选题】The main topic of the passage is ______.
A.
laughter and physical exercise have similar effects on the human body
B.
smile can produce the same effects as laughter
C.
pain can be reduced by laughter
D.
laughter is the best medicine
查看完整题目与答案
【单选题】However，at times this balance in nature is _______ resulting in a number of possibly unforeseen effects.
A.
troubled
B.
disturbed
C.
confused
D.
puzzled
查看完整题目与答案
【单选题】Advertising is often the most _______ method of promotion.
A.
efficient
B.
efficiency
C.
effect
D.
effective
查看完整题目与答案
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