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举一反三
【单选题】Passage Two Questions 66 to 70 are based on the following passage: If an agreement signed in Germany works out, travelers of this Asian city may one day be able to move from the downtown area to its n...
A.
It is difficult to see fingerprints with human eyes.
B.
There are special ways to recover a suspect’s fingerprints.
C.
Even a small part of a fingerprint is useful for identification
D.
Suspects usually try to avoid leaving their fingerprints at the scene.
【单选题】β片层结构:
A.
只存在于α角蛋白中
B.
只有反平行结构,没有平行式结构
C.
α螺旋是右手螺旋,β片层是左手螺旋
D.
主链骨架呈锯齿形成的片层
E.
肽平面的二面角与α螺旋的相同
【单选题】A．粉质黏土，流塑 B．粉质黏土，硬塑 C．粉土，稍湿，中密 D．粉土，湿，密实
A.
下表为某建筑地基中细粒土层的部分物理性质指标，据此请对该层土进行定名和状态描述，并指出下列哪一选项是正确的（） 密度ρ(g/cm3) 相对密度ds(比重) 含水率w(%) 液限wL(%) 塑限wP(%) 1.95 2.70 23 21 12