某同学在实验室里读出竖直水银气压计的示数为74cm,当地大气压强的大小为____Pa(水银的密度为13.6×103㎏/m3),由此可知,当地位置比海平面____(选填“高”或“低”)。若管子倾斜,管内与水银槽内液面高度差____。(填“变”或“不变”)
There was n____ for me to do today.
下列说法错误的是( )
People say it is Canada's most beautiful city, ____(包围)by mountains and the Pacific Ocean.
已知命题p:(x+2)(x-6)≤0,命题q:-3≤x≤7,若“p或q”为真命题,“p且q”为假命题,则实数x的取值范围为____.