BEIJING, March 12 (Xinhua) -- The World Health Organization (WHO) said on Wednesday that the COVID-19 outbreak can be characterized as a "pandemic" as the virus is increasingly spreading worldwide. "This is the first pandemic caused by a coronavirus," WHO Director-General Tedros Adhanom Ghe...
Being non-commutative, the quaternions do not form a field. However, they are still a skew field (or division ring): multiplication is associative, and every non-zero quaternion has a unique multiplicative inverse. Like the complex numbers, the quaternions have a conjugation although this is...
Cloud security is a broad set of technologies, policies, and applications applied to defend online IP, services, applications, and other imperative data. It helps you better manage your security by shielding users against threats anywhere they access the internet and securing your data and applicatio...
Volunteers help a blind girl to sit the Gaokao in Anhui Province on June 7, 2015. (Xinhua/Liu Junxi) The exam system, however, is not free of critics, as the fierce competition and the overemphasis on examination grades mean great pressure for the students....
更地道的表达就是:“What time is it,please?”这样说更符合英文表达的思维。 02 什么时候要加now 但是在某些特定的情况下,是需要加now的。 比如你在跟某人打电话的时候,对方的时间与你所在的地方有时差,就要加上了。 例: What ...
A B C D told to._答案 句意:他没有什么可说的,只是照吩咐去做。在含but的句型中,如have no choice but..,have nothing to do...but to do。but前有do,则but后的不定式不能带to, 相反,but前如果找不到do,则but后的不定式必定带to,即通常所说的:“有do无to,...
You may look it up in the English-Chinese dictionary.It will tell you something about the word:the pronunciation(发音),the part of speech(词性),the Chinese meaning and also how to use this word.But how can you know where the word is in thousands of English words?...
The duchess personally chose the book because it is a title she likes reading with her own children, having enjoyed a longer version of the book when she was young. 24. Which of the following best describes Kate's reading show? A. Costly. B. Controversial. C. Time-consuming. D. Labour...
Section 501(c)(3) is a portion of the U.S.Internal Revenue Code (IRC)and a specific tax category fornonprofit organizations. Organizations that meet Section 501(c)(3) requirements are exempt from federal income tax. TheInternal Revenue Service (IRS)recognizes more than 30 types of nonprofit ...
The CPI is a measure of inflation and deflation. The CPI report uses a different survey methodology, price samples, and index weights than theproducer price index (PPI), which measures changes in the prices paid by U.S. producers of goods and services. ...