焦炉有效炉龄为20-25年,在此期间内大部分砌体应该热修。

Tom likes __________.[ ]

A. Saturdays and Sundays

B. Saturday and Sundays

C. Saturdays and Sunday

Speaker A: I can't stand the school cafeteriA．The food is terrible. Speaker B:______

A．I agree with you. It's quite difficult to find a seat in the cafeteria.

B．Yeah, you will feel more comfortable if you sit down.

C．Yeah, but that's not the worst thing about it. It's also very dirty.

D．I don't see why they don't supply some seats for us.

有些学生学习事倍功半，对此你如何利用指导教学方法提出好的建议

由于施工的原因导致商品住宅出现质量问题，应首先由（）对购房者承担责任。

A.施工单位

B.房地产开发

C.监理单位

D.房地产开发主管部门

下列关于期权的说法，正确的是（）。

A.与远期、期货一样，期权的买方行使其权利，承担其义务

B.投资者一般在预期价格上升时，购入看跌期权

C.期权买方为了行使其权利，需要向期权卖方支付一定的期权费

D.美式期权是目前较为流行的方式