A. has good parenting skills

　　B. is always making promises

　　C. is strict with her daughter

　　D. tries her best to save money

　　答案：A　推理判断题。由最后两段可知，我是一名采用“潜水艇”式教育孩子的妈妈，所给的例句充分证明我是一位有着很棒的抚养孩子方法的妈妈。

　　D

　　(2017·成都一诊)

　　When most people think of giant pandas, the pictures of the cute, black­and­white bears from China that eat bamboo will immediately jump into their mind. Scientists from Mississippi State University, however, are interested in what the bears leave behind: their poop(排泄物). At a recent meeting in Denver, Professor Brown at the university presented her research showing how panda poop could inspire a new way to obtain energy from plants, which are a renewable energy source. Usually, plants can be called biomass(有机燃料) when they are used as an energy source.

　　Burning biomass is one way to capture its energy, but Brown hopes panda poop can teach scientists something about breaking down biomass. Pandas—or at least the bacteria in their stomachs—are very good at getting energy out of bamboo. Unlike cows, which use 4 stomachs to digest large amounts of grass, a panda has only one stomach. Bamboo comes in, and poop goes out.

　　Every day for 14 months, Brown and her team on this project, counted the bacteria in the poop of the two pandas, YaYa and LeLe living at the Memphis Zoo. Her studies turned up 12 species of bacteria that break down biomass, including one that had never been found in pandas. Brown says that because the poop contains bacteria that break down biomass, it could also be used to break down other types of biomass.

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