题目内容

"Boy on cliff is rescued" is a typical example of omission used in headlines.

A. 对
B. 错

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Punctuation is commonly used in headlines, such as comma, colon, and double quotation marks.

A. 对
B. 错

Identify the rhetorical devices used in the following headlines. Some choices can be used more than once.

丙烷的燃烧反应为C3H8(g)+5O2(g) →3CO2(g)+4H2O(l),当132g C3H8(g)完全燃烧时放出6600KJ热量,则该反应的反应热是（）。

A. 6600KJ
B. -2200KJ
C. 3300KJ
D. -1100KJ

等温、等压只作体积功的条件下,化学反应自发进行的判据是（）。

A. ΔrGθm < 0
B. ΔrGm < 0
C. ΔrHm < 0
D. ΔrSm > 0