有一底面宽度为b的钢筋混凝土条形基础，其埋置深度为1.2m。取条形基础长度1m计算，其上部结构传至基础顶面处的标准组合值：竖向力FK，弯矩MK。已知计算GK(基础自重和基础上土重)用的加权平均容重γG=20kN/m3。基础及工程地质剖面如下图所示。

黏性土层①的天然孔隙比e0=0.84；当固结压力为100kPa和200kPa时，其孔隙比分别为0.83和0.81。试计算压缩系数a1-2并判断该黏性土属于( )压缩性土。
A．非
B．低
C．中
D．高

Can you imagine who on earth is our human being's most dangerous enemy?—The rats! Men are the cleverest and most dangerous animals on earth. Rats come second. Men kill their enemies. They have killed millions of men since ancient times—but rats have killed hundreds of millions of men. Rats carry diseases. Black rats carry fleas, and these fleas give men bubonic plague. Bubonic plague still kills thousands of Asians and Africans today as it killed millions of Europeans in the past until brown rats came to Europe and pushed the black rats out. There is no plague in Europe today, but brown rats carry thirty-five other diseases typhus for example. Typhus has killed 200 million people in the last 400 years. Rats are dangerous. They not only carry diseases into men's homes, they also take men's food. They eat 33 million tons of grain every year. That is enough to feed 200 million people—so men die of hunger because rats eat their food. Rats are clever too. They have good leaders. Men try to poison them, but if their leaders tell them that food is dangerous they do not eat it. So our cities and villages are full of rats. We can go to the moon, but we cannot kill this dangerous enemy. Why? Is it because we are not clean?Human beings are afraid of rats mainly because ______.A．rats have clever leadersB．rats are clever than menC．rats steal men's foodD．rats killed hundreds of millions of men 点击查看答案

听力原文：W: You're going to Guangzhou tomorrow, aren't you?M: Yes. I thought I'd fly, but then I decided that taking a bus would be cheaper than driving or flying.Q: How will the man get to Guangzhou?(2)A．By plane.B．By car.C．By train.D．By bus. 点击查看答案