【单选题】在RLC串联电路中电阻 上的电压U R与总电压U的关系()
【单选题】会議は ( )にわたって、北京で開かれた。
【简答题】新加坡是亚洲的发达国家,被誉为“()”之一,其经济模式被称作为“()”。
【多选题】在RLC串联电路中,电阻上的电压U R 与总电压U的关系有()。
【单选题】______, ______ many boys, Jack like playing football.
A.
In a fact; in common with
D.
Actually; in common with
【单选题】原核细胞与真核细胞有许多不同点,但二者都具有的细胞器是( )
【单选题】The underlined words 'this fact' in Paragraph 3 refer to the fact that ______.
A.
it costs a lot to test a plane
B.
the wings are not good enough
C.
some problems are found with a plane
D.
the wings meet the high-speed air flow in the tunnel
【单选题】The problem lies ___ she knows little English.