对冠心病诊断最有价值的检查是()
A.胸透
B.心脏平片
C.心电图
D.超声心动图
E.选择性冠状动脉造影
参考答案:E
下列物质的合成过程中不需要供给P的是[ ]
A.脂肪
B.ADP
C.磷脂
D.RNA
用括号内动词的适当形式填空。
1. Little Jack ______ (be) here a moment ago.
2. Amy ______ (meet) a famous actor yesterday.
3. Miss White ______ (come) to China in 2005.
4. There ______ (be) forty-three students in our class last term.
5. I ______ (visit) my grandparents last Sunday.