板块边界按其应力状态可分为三个边界,下列边界没有板块的生长,也没有板块的消减的边界是()
A、拉张型边界
B、碰撞型边界
C、汇聚型边界
D、剪切型边界
参考答案:D
—Do you know ______ Tom was punished by his father?
—That was ______ he refused to go to school.
A.why; because
B.when; why
C.how; when
D.why; why
关于正常精液的叙述下列错误的是( )
A.液化后可呈半透明乳白色B.新鲜排出的精液凝成胶冻状C.液化时间不超过30分钟D.精液不液化可抑制精子的活动E.久未射精者排出的精液可呈浅黄色