关于火灾后的通风,下述不正确的是:
A、在未探明火情前,严格控制通风
B、已探明火情,可根据情况决定是否通风
C、灭火力量不足时,应断绝通风
D、有人员被围时,必须通风
参考答案:D
There aren't ______ under the tree, but there are ______ birds in it. [ ]
A. any bikes, some
B. not bike, any
C. the bikes, some
D. some bikes, any
物质的唯一特性是()
A.客观实在性
B.可知性
C.运动
D.联系