There are _________ flowers in the park.
A. hundreds of thousands of
B. hundreds of thousand
C. hundred of thousands of
D. hundreds of thousand of
Tom carried only money to make change for a_________ bill.
A. nines-dollars
B. nines-dollar
C. nine-dollars
D. nine-dollar
医疗机构和医务人员应严格落实《医务人员手卫生规范》要求，佩戴医用外科口罩或医用防护口罩，必要时戴哪种手套（)。
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