21世纪的竞争,归根到底是()的竞争。
A.知识
B.科技
C.能源
D.人才
参考答案:D
—Mary has invited me to her birthday party this evening, Mom.
— ________[ ]
A. Best wishes.
B. Have fun
C. Good luck.
D. Happy birthday.
下列哪项不属于胸痛的性质()
A.烧灼痛
B.刀割样痛
C.牵涉痛
D.绞痛
E.刺痛