若“五·一”假期你到日本旅游，不能进行的项目是[ ]
A．泡温泉
B．滑雪
C．赏樱花
D．雨林探险
答案：D
_ we were walking along the river, we heard a cry for help.
A．While
B．Until
C．After
D．Before
中深爆破的孔深一般是（）
A.<2m
B.≥2.5m
C.≥5m
