四大媒体广告是指()广告、()广告、()广告和()广告。
参考答案:电视;广播;报纸;杂志
There ________ a lot of juice in the fridge. [ ]
A. has
B. is
C. are
D. have
诊断休克的主要依据为
A.临床表现
B.脉率变快
C.血压下降
D.动脉氧分压<60mmHg
E.尿少