疾病症状和体征不典型,发病缓慢、患病率高等见于下列哪类人群( )
A.中年人B.老年人C.青年人D.妇女E.免疫缺陷者
参考答案:B
—Are there desks in the room?
—Yes, there are ______.[ ]
A. some; some
B. some; any
C. any; some
D. any; any
Mary spends a lot of money on clothes _____ her family is not rich.
A.because
B.though
C.if
D.so