故填which.(5)contains. 考查时态和主谓一致。句意:颗粒物中含有微小的颗粒,这些颗粒非常小,如果被人吸入就会导致严重的疾病。描述一个客观的事实,应用一般现在时,主语Particulate matter为第三人称单数,故填contains.(6)seriously. 考查副词。句意:颗粒物中含有微小的颗粒,这些颗粒非常小,如果被人吸入就会导致严重...
Both of them are used to indicate the subject in the sentence, making them almost the same in use, which can cause confusion. When creating sentences, you should be careful which one you’ll use unless it doesn’t matter in that particular sentence. With practice, you’ll get the hang ...
The nucleus of an atom is composed of protons and neutrons, which are tightly packed together. Orbiting the nucleus, we find the tiny, negatively charged particles known as electrons.Answer and Explanation: The two subatomic particles that make up the mass of an atom are protons and neutrons. ...
Democritus suggested that eventually there'd be a point at which the object could not be cut anymore, and there must be some fundamental piece to all things. He called this indivisible piece of all matter atomos. Millenia later, smoking gun evidence for the existence of atoms was observed ...
One of the basic units of which atoms and all matter are made. Protons, neutrons and electrons are subatomic particles. Did You Know?Until the 20th century, scientists thought that atoms were the smallest units of matter. This view started to change following some experiments in the late 1800...
Ahmed Al-Gharati, director of the internal medicine at the Al-Jumhori Hospital in Sana'a told the Yemen Times that "strange particles with dust are being moved within the air stream to the human body through the respiratory system, the uncovered skin, eyes, mouth or ears which are exposed...
Collision theory（碰撞理论）指的是化学反应发生的前提是反应物分子之间发生碰撞，且这些碰撞必须满足一定...
For example, it is expected that the accretion disks surrounding supermassive BHs in the core of AGNs would contain highly conducting plasma, which can lead to the manifestation of regular electromagnetic fields in the vicinity of such central BHs. In addition to the many energy features produced...
Because of the amount of energy released, beta decay is more harmful. If a beta particle penetrates living matter, it can alter the structure of a molecule which can cause cancer or other health concerns. Ironically, this same process is used in radiation treatments to treat cancer as well....
Active matter represents a diverse range of non-equilibrium systems, in which their constituents can autonomously move or spin by converting energy into mechanical work; this phenomenon leads to intriguing collective dynamics, such as flocking1,2,3,4, activity-induced phase separation5,6,7,8, emer...