填写票据和结算凭证时，中文大写金额数字书写中可以使用繁体字。()
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Why does the author mention "planktonburgers" in paragraph 3？
A. To describe the appearance of one type of plankton.
B. To illustrate how much plankton a whale consumes.
C. To suggest plankton as a possible food source.
D. To compare food values of beef and plankton.
【B11】
A. have
B. as
C. in
D. on
The underlined word "heritage" in paragraph 1 is closest in meaning to ______.
A. history
B. civilization
C. tradition
D. feature
【B13】
A. born
B. given
C. having
D. covered
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