疟疾患者常见的热型是（）
A.稽留热
B.弛张热
C.间歇热
D.回归热
E.波状热
参考答案：C
解析：间歇热临床常见于疟疾、急性肾盂肾炎等。
The football player had ________ gift for football when he was a child. Now he is ________ second to none in the football field.
A．the; the
B．the; a
C．a; /
D．a; the
在地球陆地上面积最大、地位最重要的生态系统是 ( )
A．森林生态系统
B．草原生态系统
C．荒漠生态系统
D．农田生态系统
