Some persons gain goal and direction from their tensions;others ________ under pressure.
B
译文：一些人因为压力达到了目的，而另一些人在压力下则精神崩溃。本题考查短语区分。A.脱落，争吵;B.崩溃，垮了;C.指望，依靠，退到;D.赞成，同意。
Whichofthefollowingcoveragecovergeneralaverageandsalvagecharges?____
Themarinecargoinsurancepremiumratesmayvarydependingonfactorssuchas（）.
Accordingtoacertaintypeofrate,ashippercannotbechargedlessthantheappropriaterateof4kginmostcases,eventhoughhisparticularconsignmentmayweighlessthanthis,wecallthistypeofrate（）.