根据句子结构可知,本句是含有宾语从句的主从复合句,howmany (多少)引导宾语从句,produce(产生)是动词,与tears(眼泪)是动宾关系,所以用被动语态,根据主句中的谓语measured(测量)可知用一般过去时态,一般过去时态的被动语态结构是was/were+过去分词,从句主语tears(眼泪)是复数,be动词用were,produce的过去分词是produced,...
试题来源: 解析 答案: were produced详解: 考查时态语态。 句意:在实验中,研究人员首先测 量了狗狗在家里和主人在一起的时候会流出多少眼 泪。 根据“they were”可知, 主句为一般过去时,主语tears与谓语produce为被动关系。 故填were produced。 反馈 收藏 ...
(2022·北京朝阳·九年级期末)Tears can ruin (毁坏) make-up, bring a conversation to a stop, and give you a runny nose. They can leave you ashamed and without energy. However, crying is a fact of life, and tears are very useful. Even when you’re not crying, your eyes produce tears...
It is difficult, however, to produce a pulsatile flow with an impeller pump, since blood damage will occur when a pulsatile flow is produced. Further investigation has revealed that the main factor for blood damage is turbulence shear, which tears the membranes of red blood cells, resulting in...
Cutting an onion can produce crying and tears. This trick, backed by experts, can help you stop crying when slicing or chopping onions and it's safe and easy.
Farzan described a compound that prompts muscles to produce a special protein that, unlike most antibodies, has both a head and a tail. The head of the protein blocks one site on an HIV spike, and the tail blocks the other, making it impossible for the virus to attach to an immune ...
of greenhouse gas we produce in our daily lives.Fortunately, nowadays it is much easier to make eco-friendly lifestyle choicesthan, let’s say, 20 years ago. But one question has been on my mind a lotlately: is it better to buy new eco-friendly products or used traditionallyproduced ...
Solution: Tissue paper is delicate, so handle it gently. If it tears, don’t worry! Small tears won’t be noticeable once the flower is fluffed out. For larger tears, use a small piece of clear tape on the backside to mend it. ...
As you age, it becomes more difficult for your eyes to react to light, especially in darker settings. Your eyes may also feel drier as you get older as the eyes don’t produce as many tears. You can also have issues with objects blending into the background as well as floaters/spots ...
Try to, in most cases, talk less than the other person. While listening to the person talk, silently say a short prayer for them. Avoid any impression of putting yourself above the other person. Remind the person that the devil is the accuser, but God is the forgiver. Regard tears an...