The sky blue. The clouds white.[ ]
A. is, are
B. is, is
C. are, is
答案：A
The （）were carefully inspected before we issue the Phytosanitary Certificate.
A．animal products
B．plant products
C．machjnes
D．electronic toys
下述继发性肺结核活动期影像，哪项不对（）
A.厚壁空洞
B.薄壁空洞
C.肺门淋巴结肿大
D.胸腔积液
E.肺内病灶新旧程度不等
