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【判断题】
粗骨料的级配按供应情况有连续和两种之分。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】Britain, ______________many other industrialized countries, ______ experienced major changes over the past 100 years.
A.
together with; have
B.
as well as; have
C.
in common with; has
D.
instead of ; has
【简答题】如将变压器误接到等电压的直流电源上时,由于E= ,U= ,空载电流将 ,空载损耗将 。
【单选题】Many important leaders of different countries______ in the opening ceremony of the 29th Olympics held on August 8,2008.
A.
turned up
B.
turned down
C.
turned on
D.
turned over
【简答题】如将变压器误接到等电压的直流电源上时，由于空载电流将（），空载损耗将（）
【单选题】用 LED 做 12V 电源指示,已知 LED 正向压降为 2.2V ,电流为 5mA 左右,则限流电阻应选 ( ) 为宜。
A.
200 Ω
B.
560 Ω
C.
1.8k Ω
D.
3.6K Ω
【单选题】This kind of fruit not only sells well on the local market, but is also _____ to many countries at the same time. [ ]
A.
exploited
B.
exported
C.
explored
D.
exploded
【单选题】–May I drink water? –Sorry, I don’t have__________.
A.
any; some
B.
some; any
C.
some; some
D.
any; any
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