目前我国黄土高原地区最突出的环境问题是[ ]
A、风沙危害
B、水土流失
C、植被破坏
D、土质疏松
答案：B
“初唐四杰”之一杨炯擅长的诗体是( )
A．五言律诗
B．五言古诗
C．七言律诗
D．七言古诗
His answer was _______, so no one could make out what he meant.
A．ambiguous
B．unconscious
C．transparent
D．explicit
