砂壤土是农业上最理想的土壤质地。（）
参考答案：错
I don’t know when he ____. But if he ____, I’ll ring you up.
A．comes, will come
B．will come, will come
C．comes, comes
D．will come, comes
疏水胶体溶液是
A．低分子溶液剂B．高分子溶液剂C．乳剂D．溶胶剂E．混悬剂
