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【单选题】
More than half of the 3 million annual visitors come to Yellowstone National Park in July and August. In September and early October, the weather is good, the visitors few, and the wildlife abundant. In May and June, you can see newborn animals, but the weather may be cold, wet, and even snowy. Between about November through April most park roads are closed to vehicles. Topic sentence is:A.
The best time to visit Yellowstone National Park is from September to October.
B.
Yellowstone National Park is the oldest and largest national park in the United States.
C.
People can enjoy seeing the beautiful scenery and live animals in Yellowstone National Park.
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【单选题】马克思说:“一切商品对它们的所有者是非使用价值,对它们的非所有者是使用价值。”也就是说,商品的使用价值和价值不可兼得。“不可兼得”的意思是说
A.
要获得商品的价值，就必须放弃商品的使用价值，反之亦然
B.
使用价值和价值没有统一性
C.
没有使用价值就没有价值
D.
价值寓于使用价值之中
【简答题】A．Not look into his eyes. B．Stare at him. C．Keep eye contact. D．Avoid eye contact.
【简答题】文献有三个不可分割的基本要素,其中( )是构成文献的最基本的要素,是文献的灵魂。
【简答题】要获得商品的(),就必须放弃商品的();要得到商品的(),就不能得到商品的()