某三层砖混结构采用墙下条形基础，基础埋深1.5m，抗震设防烈度7度，地质条件如图3-15所示，杂填土层重度γ=17.5kN/m³，黏土层重度水上γ=18kN/mm³，水下γsat=20kN/mm³，地下水位在地表下3m。

试问，根据本工程的地质资料，第三层粉砂可初步判别为下列哪一项?（）

题18～19：某多层框架结构，采用桩基础，土层条件如图3-16所示。 假定采用嵌岩灌注桩基础，桩底无沉渣，桩端下无软弱夹层、断裂带和洞穴，岩石饱和单轴抗压强度标准值为5MPa，岩体坚硬、完整，试问，桩端岩石承载力特征值(kPa)最接近于下列何项数值? 提示：①在基岩埋深不太大的情况下，常将大直径灌注桩穿过全部覆盖层嵌入基岩，即为嵌岩灌注桩。 ②此题只计算桩端阻力。A．6000B．5000C．4000D．2500 点击查看答案

听力原文：M: Did you take these pictures? They are very good.W: Yes, I think they turned out very well too. I'd like to bring my camera with me wherever I go. In that way if I see something attractive I can snap a picture of it.M: Carrying a big camera round is too much trouble for me.W: My camera is really small enough. Here let me show you.M: That is a compact camera. But you must know a lot about photography to get such professional looking results.W: Not necessarily. This camera is simple to work.M: Does this model come with a flash attachment for indoor shot?W: Better than that. It has a built-in electronic flash and an automatic focus too. I don’t even have to worry about focusing.M: That’s what I need. When I take pictures, they usually come out blurry because I don’t adjust the lenses properly, And I hate photos that are out of focus. Is the camera like yours very expensive?W: Less than you'd expect. Why don’t you check the prices at Headfields Demonstrate? This model is on sale there last week.M: I think I will. It certainly won’t hurt to take a look.As the conversation begins, what are the man and woman doing?A．Looking at some photographs.B．Selling cameras.C．Teaching a photography class.D．Repairing camera equipment.

A.
W:
B.
M:
C.
W:
D.
M:
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W:
F.
M:
G.
M:
H.
M:
I.
As
J.Looking
K.
B．Selling
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C．Teaching
M.
D．Repairing
N.

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