疱疹性咽峡炎的病原体为A．流感病毒 B．副流感病毒 C．柯萨奇病毒 D．单纯疱疹病毒
题型：单项选择题
问题：
疱疹性咽峡炎的病原体为
A．流感病毒
B．副流感病毒
C．柯萨奇病毒
D．单纯疱疹病毒
E．腺病毒
题型：单项选择题
| 从方框中选择恰当的短语，并用其正确形式填空（每条短语只能选用一次）。 | |
| |
1. _______ sm oking and drugs!2  . _______ his teacher’s help, he’s made great progress in maths.3. According to the writer, we sho  uld walk _______ 10,000 steps every day.4. When farmers are working in the fie  lds, they are taking good exercise_______. 5. It’s important to eat _______ the right things such as fruit  and vegetables. |
