【多选题】关于CSS优先级,说法正确的有
A.
优先级就近原则,同权重情况下样式定义最近者为准
C.
基本优先顺序为: !important > id > class > tag
【单选题】Look at the floor , Tom ! _____you watch TV while having a meal?
【单选题】胃肠钡餐造影时,关于胃溃疡龛影周围透明带的描述,正确的是( )
A.
龛影口部一条宽5~6mm的光滑整齐透明线,称黏膜线
C.
龛影口部明显狭小,使龛影犹如具有一狭长颈,称狭颈征
D.
龛影口部一条宽3~4mm的光滑整齐透明线,称黏膜线
【单选题】—May I watch TV for a while? —No,you .You have to finish your homework first.
【单选题】While you are on watch entering port, the Master gives the helmsman a rudder command which conflicts with a rudder command from the Pilot. You should make sure the helmsman ______.
C.
asks you for instructions
D.
brings the rudder to a point midway between the two conflicting positions
【单选题】下列说法中错误的是
A.
欧姆定律表明流过电阻的电流与其端电压成正比,而与其本身的阻值成反比
B.
当电压和电流取为关联参考方向时,欧姆定律可表示成 U=IR 。
C.
当电压和电流取为非关联参考方向时,欧姆定律可表示成 U= - IR 。
D.
欧姆定律不仅适用于线性电阻元件,而且也适用于非线性元件。
【单选题】“What did you do last night?” “I did my homework and ________TV.” [ ]