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【单选题】
悬浮式二灰粒料的特点是（ ）。
A.
石灰粉煤粉与粒料之比为 15：85～20：80
B.
混合料中的粒料能形成骨架
C.
收缩性大，易产生干缩裂缝
D.
在快速公路上使用较多
参考答案：
参考解析：
刷刷题刷刷变学霸
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.