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【单选题】
已知伏安法测电阻实验选用直流毫安表（C31-mA型 a=0.5 量程:5-10-20-50mA 内阻:约为2.5-2.2-1.1-0.6Ω），如果电流表量程选择20mA，那么电流表的内阻是多少？A.
1.1 欧姆
B.
2.2 欧姆
C.
2.5 欧姆
D.
0.6 欧姆
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举一反三
【简答题】What is still uclear about the case?
【单选题】This is the shop ______ I often buy foodstuff.
A.
where
B.
which
C.
of which
D.
to which
【简答题】Do you often think of your parents? You may say, “Of course, I 小题1: . I buy a gift for my mother on Mother’s Day and on Father’s Day I give my father a gift, too.” But what about the other days of the...
【单选题】The girl likes to buy cheap things. She often spends ______ money on ____ things.
A.
more, fewer
B.
fewer, more
C.
less, more
【单选题】What are the characteristics of chicken red blood cells?
A.
n uclear
B.
non nuclear
C.
particle
D.
none of the above
【单选题】-------是最早诞生的广告形式,伴随着人类文明发展的始终,在原始社会主要以文化广告的形式出现 在奴隶社会及以后时期则表现为政治广告、军事广告和文化广告三种主要形态。
A.
商品广告
B.
社会广告
【多选题】Ion exchange property of zeolites are applied in the following fields such as
A.
Drinking w ater s oftening
B.
N uclear waste cleanup
C.
Oxygenerator
D.
Production of detergents
【多选题】Which of the followings belong(s) to renewable energy( 可 再生 能源 )? (There may be more than one answer)
A.
n uclear energy
B.
geothermal energy （地热能）
C.
wave energy
D.
coal
E.
natural gas
F.
hydraulic power （水力）
G.
tidal energy（潮汐能）
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