用变色酸比色法测定空气中甲醇，配制的0.5％变色酸溶液放在冰箱中保存，可使用（）；配

蛋糕，25克/只，8只/盒

填空。用所给词的适当形式填空（共10小题，每小题1分）

小题1:I have received your _______________(invite). Thank you very much.  

小题2:We’re _________ (plan) to visit France this summer.

小题3:He gave a detailed __________________(describe) of the thief.

小题4:At first nobody noticed the child’s ________ (appear). A few minutes later, his mother shouted, “ Where’s my child?”

小题5:_______________ (true) black flowers do not actually exist.

小题6:I have trouble ________(work) out the maths problem

小题7:Mary showed her ________ (confident) when she went into the room. 

小题8:There was an accident last night. __________ (lucky), the young man was not badly hurt.

小题9:I’ll do whatever I can ____ (improve)my English.

小题10:A letter of __________ (apply) is very necessary when your are finding a job.

如图所示某柱下独立基础，基础底面尺寸3.0m×2.5m，上部结构传至基础的荷载效应：轴向荷载F_k=1650kN，基础埋深1.5m(不考虑相邻基础荷载的影响)。

基础底面附加压力最接近于（）。

A．202.0kPa

B．228.4kPa

C．238.0kPa

D．222.0kPa

排除切丝机切后烟丝粘连的故障，可调低上刀门压力或更换严重磨损的（）。