皇乾殿院落的西角门是哪位皇帝下令增辟的？同时规定了什么情况下才可经西角门出入？
参考答案：乾隆皇帝；规定皇帝年逾70才可经西角门出入。
—Mum,it is nice weather.I want to skate this afternoon.
—Don’t you think the ice on the lake is too thin to __________ your weight?
A．stand
B．bear
C．catch
D．take
纤维囊性乳腺病可发生（）
A.葡萄胎
B.宫颈癌
C.乳腺癌
D.精原细胞癌
