问题
单项选择题
对痤疮丙酸杆菌有杀灭和溶解粉刺作用的外用药物是（）
A.0.1%维A酸软膏
B.2%水杨酸酊
C.2.5%硫化硒洗剂
D.5%过氧化苯甲酸
答案
参考答案：D
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对痤疮丙酸杆菌有杀灭和溶解粉刺作用的外用药物是（）
A.0.1%维A酸软膏
B.2%水杨酸酊
C.2.5%硫化硒洗剂
D.5%过氧化苯甲酸
参考答案：D
| 从方框中选择恰当的词填空。 | |
2. You'd better _______________ an underground there. It's quite far. 3. Millie decided _______________ in the school that day. 4. Where is my pen? Tom _______________ it to the library. 5. Where are the twins? I _______________ them for two days. |