正确答案: C

the internal passages

题目：Cooling water is circulated through______in some injectors.

解析：C

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举一反三的答案和解析：

[单选题]港口国监控的检查官一般要对_______船舶进行详细检查。

不适航船舶

[单选题]心肺复苏有效指征()Ⅰ.皮肤黏膜由紫绀变红润Ⅱ.颈动脉有无变有Ⅲ.瞳孔由大变正常

ⅠⅡⅢⅣ

[单选题]A segregated ballast system is a system where

all ballast lines, tanks, and pumps are independent of those used for oil