某工程中需填筑土坝，最优含水量为23%，土体天然含水量为12%，汽车载重量为10t，若把土体配制成最优含水量，每车土体需加水量为（）。
A.0.78t
B.0.88t
C.0.98t
D.1.08t
参考答案：C
解析：
解方程组得
ms=8.93
mw=1.07
m＇w=0.23×8.93=2.054
m＇w-mn=2.054-1.07=0.984(t)
One day a pig went to the stable（马棚）to __1__ a good friend, an old horse, and was going to ___2__ there for the night . Night came and it was time___3___ sleep. The pig went into the straw heap(稻草堆) and lay comfortably（舒服地）. A long time __4__, but the horse was still___5___ there and did not move. So the pig asked the horse ___6____ he did not go to sleep. “Standing like this is the beginning of sleeping.” answered the ____7____.The pig found it __8___ to believe(相信) and said, “How can you stand there sleeping? It is not comfortable at all.” The horse answered, “Comfort is your habit(习性).___9____ horses, we have the habit of running quickly. So we are always ready to run quickly even if(即使) we are __10___.
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