A:L1变暗
B:L1变亮
C:L2变亮
D:L2亮度不变
人类必须控制人口增长的原因包括( )
“倭寇投降……特请先生克日惠临陪都,共同商讨……”,其中“陪都”是( )
短周期元素组成的物质Q,发生如下反应:QR+T+H2O,下列说法正确的是( )
Jerry won first prize in the speech competition. His parents are proud of his______.
- There are dark clouds, and the wind is blowing strongly.
- It ______ that a typhoon is coming.