西周宗法制的最大特点是[ ]
A．子承父制
B．嫡长子继承制
C．禅让制
D．科举制
答案：B
—Could I borrow your dictionary?
—Yes, you _____.[ ]
A. can
B. could
C. were able
D. may
焦炉用高炉煤气加热时，煤气温度不得高于（）℃。
A、20
B、35
C、40
