味觉发育的关键时期为（）
A.1～2个月
B.2～3个月
C.3～4个月
D.4～5个月
E.6～9个月
参考答案：D
肝癌患者行介入栓塞化疗术最常用栓塞剂是
A．NBCA胶
B．38%碘化油
C．40%碘苯酯
D．60%泛影葡胺
E．40%Gd-DTPA
句型转换。
1. There are some offices in our school. (改为否定句)
There ______ ______ offices in our school.
2. There is a bike in front of the car. (改为一般疑问句, 并作肯定回答)
______ ______ a bike in front of the car?
Yes, ______ ______ .
3. There are some dictionaries on the desk. ( 对划线部分提问)
______ ______ dictionaries ______ ______ on the desk?
