已知HOAc的pKa =4.74，则0.10 mol·L-1HOAc溶液的pH为2.87。（ ）
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已知HOAc的pKa =4.74，则0.15 mol·L-1NaOAc溶液的pH为8.96（ ）
A. 对
B. 错
已知NH3·H2O的pKb=4.74，则0.10 mol·L-1NH3·H2O溶液的pH为11.13。（ ）
A. 对
B. 错
已知NH3·H2O的pKb=4.74，则0.15 mo1·L-1NH4Cl溶液的pH为5.04。（ ）
A. 对
B. 错
Which of the following statement is TRUE about writing an application letter?
A. The letter should be addressed to a specific individual.
B. You may brag and boast your own ability and qualification.
C. You should provide your contact and request an interview.
D. Specify the job you want.
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