Which of the following underlined parts is different in pronunciation from the others?

A．The gate is too narrow for a car to get through.

B．The facts allow no other explanation.

C．A row of children are standing in front of the chairs.

D．You can borrow money from the bank to buy your new house.

混凝土的稠度一般以坍落度表示，精确到（）；当坍落度大于220mm时以（）表示，当坍落度小于10mm时，以（）表示。