四季如春的“春城”最可能出现在[ ]
A．高纬度、低海拔地区
B．高纬度、高海拔地区
C．低纬度、低海拔地区
D．低纬度、高海拔地区
答案：D
Students must be strict ____ their studies and teachers should be strict _____ their students.
A．in, at
B．at, with
C．with , in
D．in, with
船舶保安评估可以由公司保安员实施；也可委托具备船舶保安评估资质的机构实施。（）
