下述各项中不属于心脏压塞的体征是()
A.血压下降或休克
B.颈静脉显著怒张
C.脉压增大
D.奇脉
E.心音低钝遥远
参考答案:C
More and more trees were cut down. _____, many animals are dying out.
[ ]
A. In the end
B. So that
C. As a result
D. At last
使用氰化物作抑制剂时,其矿浆条件必须是()。
A、酸性
B、中性
C、碱性