由血管活性肠肽瘤(VIP瘤)引起的腹泻的性质为()
A.动力性腹泻
B.分泌性腹泻
C.渗出性腹泻
D.渗透性腹泻
E.吸收不良性腹泻
参考答案:B
不等式x2-mx+1≥0对于任意的x∈R均成立,则实数m的取值范围为( )
A.(-∞,-2]∪[2,+∞)
B.(-∞,-2)∪(2,+∞)
C.(-2,2)
D.[-2,2]
You do need to _____ students’ great potential for learning English.
A.aware of
B.aware that
C.be aware that
D.be aware of