玻璃瓶采血产生的潜在危险是()
A.产生凝块
B.产生脂血
C.易溶血
D.空气栓塞
E.瓶子易碎
参考答案:D
“冬季比较温和,夏季比较凉爽,年降水量较多,季节分配较均匀”描述的是[ ]
A.地中海气候
B.温带大陆性气候
C.温带季风气候
D.温带海洋性气候
The computer system __________ suddenly while he was searching for information on the Internet.
A.broke down
B.broke out
C.broke up
D.broke in