小儿肺结核的主要类型是
A．结核性胸膜炎
B．原发型肺结核
C．结核瘤
D．急性粟粒型肺结核
E．支气管内膜结核
参考答案：B
A cofferdam is（）.
A.any deck below the main deck and above the lowest deck
B.a member that gives fore-and-strength
C.made by placing two bulkhead a few feet apart
D.a heavy fore-and-aft beam under the deck
海上丝绸之路
