[问答题]We must take somemeasures to control the pollution.
[问答题]We must take some measures to control the pollution.
[问答题]We must take some measures to control the pollution.
[问答题]Air pollution is more serious than water pollution.
[问答题]Air pollution is more serious than water pollution.
[问答题]They thought that there must be something wrong with theirTV set.
[问答题]They thought that there must be something wrong with their TV set.
[问答题]They thought that there must be something wrong with their TV set.
[问答题]They thought that there must be something wrong with their TV set.
[单选题]To prevent excessive __ in the transverse girders, the tie bolts are positioned as close to the center of the crankshaft as possibleA.thermal stressesB.bending momentsC.thermal loadsD.surface tensions