单项选择题23()
A.highlyB.veryC.extremelyD.quite
填空题Legislators have made ______ the basis of many noise reducing programs.
单项选择题What does the speaker suggest people should do when they go shopping
单项选择题How many solar heat panels do three or four bedroom homes usually need
填空题How much of all precipitation is runoff
单项选择题22()
A.kindsB.speciesC.sortsD.types
填空题Noise can produce serious ______ stress.
单项选择题What is the purpose of building new houses facing north or south
单项选择题What’s the problem with paper napkins and plastic food wraps
单项选择题Which is not true about solar heat collector panels