外扩散有效因子反应了外扩散过程对催化反应总体速率的影响。
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Da准数越大,外扩影响越严重,外扩散有效因子越大。
A. 对
B. 错
Drills and Skills:But these are early days for the iPhone 6, Apple's latest device, whose bigger screen takes the firm into the "phablet"(平板手机) category of larger phones that are wildly popular with customers.Question: that引导的从句其先行词是?
A. iPhone 6
B. Apple's latest device
C. the phablet category
D. larger phones
起动转矩比与以下哪些变量有关
A. 起动级数
B. 额定转矩
C. 最大起动转矩
D. 额定转差率
空载起动过程的能量损耗是空载反接制动过程电动机能量损耗的3倍
A. 对
B. 错