don’t touch it directly，as it tends to get pretty hot．
Egloo started crowd-funded through an Indiegogo campaign last year，blowing past its initial goal of $30，000 and getting $262，5 13 by the end of the campaign．It’s currently available for purchase via the Egloo website，for anywhere between $50 and $100，depending on size，color and glaze．Considering some users pay that much for heat every couple of weeks，the price seems very attractive． 24．What does“it”refer to in the 2nd paragraph? A．Heat． B．Egloo．
C．Electricity．
D．Tealight．
25．What should we be cautious of when using Egloo? A．Its size． B．Its weight． C．Its temperature． 26．What can we learn from the last paragraph? A．Egloo Can be bought in stores anywhere． B．Egloo had planned to raise $30，000 at first． C．Egloo is much cheaper online than in stores． D．Egloo got investment from the government．
C
It’s hair-raising news for criminals on the run．Scientists behind a new study have worked out how to identify individuals only based on the proteins(蛋白质)in a single strand of their hair．
While the police already look at DNA from hair as part of investigations，the technique is far from ideal：DNA is easily degradable，meaning it can only be analysed within a certain time period after the crime．But the new technique could even be used to solve historical or archaeological cases，making it far superior to DNA sequencing in many ways．
DNA degradation depends on several environmental factors including temperature，humidity and PH．It is also affected by the activity of bacteria and other microorganisms．In contrast，actual hairs can survive for a long time-sometimes centuries．After bones and teeth，hair is in fact one of the most resistant structures of the human body．
In order to understand how the protein can be used to identify individuals，it is important to understand mat proteins are coded by DNA．This means that a certain level of the genetic variation that we see in different people’s DNA passes into their proteins．In fact，genetic information in the DNA is translated into amino-acid chains that make up proteins．
The method not only allows for human identification but it can also reveal how old the sample is and what region it comes from，so that we can distinguish between current and ancient samples. But while the discovery is exciting，the technique is not quite polished enough to be used in the court room．The main task now will be to analyse hair samples from all over the world，which will
D．Its price．
make it a lot more reliable．
The new discovery will boost the significance of hair as evidence in courts，at a time when some forensic(司法鉴定的)disciplines have been criticised in the US．It will also be of great use in archaeology．
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